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| Corrosion Behavior of Cold Sprayed Ni/Al2O3 Coating in Marine Atmosphere Environment |
| Received:July 10, 2021 Revised:November 25, 2021 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/issn.1672-9242.2022.03.013 |
| KeyWord:cold spray Ni/Al2O3 coating salt spray corrosion |
| Author | Institution |
| FENG Lei |
The Navy Equipment Guangzhou Bureau in the Second Military Section of Chongqing, Chongqing , China |
| DING Xing-xing |
Southwest Institute of Technology and Engineering, Chongqing , China |
| SONG Kai-qiang |
Southwest Institute of Technology and Engineering, Chongqing , China |
| WANG Xuan |
Southwest Institute of Technology and Engineering, Chongqing , China |
| BAI Yi-xin |
Southwest Institute of Technology and Engineering, Chongqing , China |
| PENG Dong |
Southwest Institute of Technology and Engineering, Chongqing , China |
| CONG Da-long |
Southwest Institute of Technology and Engineering, Chongqing , China |
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| Abstract: |
| To provide a basis for improving the corrosion resistance of alloy steel, the effect of marine atmosphere environment on the corrosion damage behavior of cold sprayed Ni/Al2O3 composite coatings was studied. Cold spray technology was used to fabricate Ni/Al2O3 coating on the surface of alloy steel 30CrMnSi. After 6 months of exposure in Wanning offshore and offshore platforms, scanning electron microscope, electrochemical workstation and other analysis techniques was used to investigate corrosion behavior of Ni/Al2O3 composite coatings. After 6 months of outdoor exposure near the coast, the surface of the sample was evenly covered with salt, and light reddish-brown corrosion rust appeared in some areas. After 6 months of exposure to the offshore platform, the surface was unevenly covered with salt, and no overlapping characteristics of the sprayed coating were observed, and the coating surface was powdered. Results indicated that after 6 months of outdoor exposure near the coast of Wanning, the cold sprayed Ni/Al2O3 coating only corroded slightly on the surface, the main structure was relatively complete, and it could still effectively protect the substrate from corrosion. And after 6 months of exposure to the offshore platform, a large number of Al2O3 particles peeled off and the corrosive medium further spread, and cracks appeared in the coating, which greatly accelerated the corrosion of the coating. |
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